Printing-machine



2 SHEETS-SHEET I- Inventor M MW by 1 I W Patented J an. 27

G. W MASCORD.. PRINTING MACHINE. APPLICATION FILED APR. 4, 1m. 1,329,325.

Attorney.

G. W. MASCORD.

PRINTING MACHlNE.

APPLlCATlON FILED APR-4,1918.

Patented Jan. 27, 1920.

2 SHEETS-SHEET 2- Inventor M. M

, y M Z. W

Attorney.

UNITED srArns PATENT onrron.

GEORGE W. MASGORD, 3F BARNES, LONDON, ENGLAND.

PRINTING-MACHINE.

To all whom it may concern:

Be it known that I, GEORGE VVILLIAM MAS- oono, a subject of the King of Great Britain and Ireland, residing at 5 The Crescent, Barnes, London, S. W., 13, England, have invented certain new and useful Improvements Relating to Printing-Machines, of which the following is a specification.

This invention relates to printing machines and especially to printing machines adapted for intaglio printing and printing from complete cylinders.

The invention has for its object so to mount the intaglio printing cylinder or a complete cylinder or shell that it may be possible to readily and quickly withdraw the cylinder or shell from its spindle or mandrel respectively or from contact with the impression cylinder when it is desired to remove or to renew the printing cylinder.

The invention thus comprises broadly means for readily and quickly withdrawing the intaglio printing cylinder or the complete engraved printing cylinder or shell from contact with the impression cylinder, and means for readily withdrawing the engraved cylinder or shell from its mandrel. or support.

According to the invention the mandrel or spindle upon which the intaglio engraved. cylinder is carried is mounted upon a swiveling or pivoting bearing at one end While at the other it is mounted within a removable journal so that thus when it is desired to remove the engraved cylinder and to replace another this may be readily done by releasing one end of the spindle and moving the spindle upon the swiveling or pivoting bearing so that thus the substitution of a new cylinder or any adjustments may be effected.

According to the invention, moreover a magnetic clutch is provided. The respective engaging parts of the clutch may be shaped to a circular curvature so as to permit of the rotation of the cylinder as aforesaid upon the swiveling or pivoting bearing without undue disarrangement or disassembling of mechanism.

Alternatively a magnetic clutch of a standardform may be employed in which case the connecting shaft carrying slip rings may be laterally withdrawn.

Specification of Letters Patent. Patented. Jan. 27, 1920. Application filed. April 4, 1918. 7 Serial No. 226,760.

The invention comprises the features of construction hereinafter described.

The invention is illustrated in the accompanying drawings in which Figure 1 is a plan view of one constructional modification, showing the clutch disengaged and the cylinder and shaft movable on the radius of bearing without sliding the gears.

Fig. 2 is a corresponding view showing the clutch in the disengaged and exposed position.

Figs. 3 and 4 illustrate a magnetic clutch having fiat engaging faces, Fig. 3 illustrating the clutch in the engaged'position and a in the disengaged position.

Figs. 5 and 6 show in elevation and plan respectively a modified form of swiveling bearing moving in a radial and horizontal path only. 4

Figs. 7 and 8 illustrate in diagrammatic side elevation and front elevation respec-v tively a further modification in which the use of a clutch is dispensed with.

Figsr9 and 10 illustrate in elevationfurther constructional modifications.

In carrying the invention into effect in its application to an intaglio printing couple asillustrated in Figs. 1 and 2, the engraved cylinder (1 is mountedupon a mandrel or spindle b one end of which is carried within a spherical or'swiveling or pivoting bearing 0 by means of which'the radial movement or swing of the spindle b is permitted upon either the vertical or horizontal axis of the bearing according to the position of the intaglio cylinder to the impression cylinder a.

and to the direction from which it is desired to change or renew the cylinder so that thus the engraved cylinder a may be brought out of contact with the impression cylinder while at the other end abearing dis pro-' vided which is removable or is capable of the ready release of the opposite end of the spindle.

Any suitable known means may be provided for positioning the engraved cylinder a upon the spindle b. Theengraved'cylinder a may for example be mounted directly upon the spindle b or the cylinder a may take the form of'a shell as illustrated in Figs. 1 and 2 and may be adapted to b8 211) I V oting bearing on the intaglio or other cylinder being withdrawn out of contact with the impression cylinder and into a position where it is not supported by the hearing at the opposite end.

Upon the driving end or" the mandrel or spindle Z) on which the engra-i' 'ed cylinder at is mounted, one member f of a magnetic clutch may be secured in position, having a circular convex face which is disposed opposits to that of the other member f of the magnetic-clutch, which is provided with an oppositely disposed concave face, the curva ture of the respective opposed faces having a common center on'the axis oi the swiveling'or" pivoting bearing 0, so that'thus the radial swiveling movementimparted to the spindle and to the member of the clutch carriedby the spindleis permitted. The concave member f of the magnetic clutch is provided with coils connected in an electric circuit so that it may be energized when the clutch requires to be engaged and current may be passed through from separate insulated slip rings mounted in adjacent positions upon the spindle upon which the concave part of the magnetic clutch is mount= ed. Thus by'the operation of an electric switch the driving and driven members may beinstant'ly disconnected magnetically and f can then be moved radially without disturbing f It will be understood that the spindle of 7 will necessarily be concentric with the spindle b upon which the engraved cylinder is mounted when the engraved cylinder is in. the printing position. The concave or driving part f of the magnetic clutch may be renderedintegral with a gear wheel 9 andithese respective parts may be so mounted upon" the machine frame or in such a manner that the concave or driving part 7 of the clutch may be axially moved into or out of contact with the opposite convex face aslillustrated in Fig. 2; Grooves f may be provided on one or other of the engaging faces of the clutch and corresponding engaging ribs f similarly shaped upon the opposite face: These corresponding grooves and ribs may for example be one or two in; numberand they may be disposed in parallel positions one upon each side of the center line'of the clutch and may be disposed: transversely toi the lineof curvature ofr the engaging faces or in any other position-ioiiregi stering; The ribs and grooves mayrbe-previdedoi sufficient depth for, the

gear train of the press.

transmission of the drive. The extent of axial movement possible to the driving or concave part of the clutch is such as to permit of disengagement of the ribs and grooves on the movement of that part of the clutch away from the convex part by the means provided for the purpose.

13y such means the disengagement of the spindle carrying the intaglio cylinder from both its bearings is avoided and the renewal of the cylinder may be expeditiously effected from various directions.

Instead. of a magnetic clutch having its respective members provided with convex and concave faces, the respective members m m may as illustrated in Figs. 3 and iz-be provided with plain contact "faces and the movable member m may be drawn into its inoperative position as illustrated in Fig. l to permit of the withdrawal of the printing cylinder in the manner described. Any suitable form of: horizontal swiveling bearing may be provided other than a spherical form, for example as illustrated in Figs. 5 and 6 the bearing may be provided with a vertical cylindrical boss fitting within a cylindrical recess in the bearing bracket or machine frame around which it may move in a horizontal direction only as shown.

It will be understood that instead of employing a magnetic clutch movement may be imparted to the printing cylinder and impression cylinder direct from the main Figs. 7 and 8- illustrate such a modification in the application of the invention in which the movement is communicated to theprinting cylinder at and the impression cylinder from the gear of the press by means of a pinion 72; to a gear wheel 2' mounted uponthe end of the spindle Z) near the spherical or swiveling bearing 0. At the opposite end the spindle b has mounted upon it a gear wheel 7' engaging with a corresponding gear wheel 71 on the spindle of the impression cylinder.

Fig. 9 illustrates a further modification in which the drive is communicated from the press gear tothe impression cylinder by means of the pinion 71, to a gear wheel 7L mounted upon the end of the impression cylinder, the printing cylinder being rotated by means of gear wheels 70 and j mounted upon the opposite side of the press upon the respective spindles of the impression and printing cylinders. I

In Fig. 10 a modification of the arrangement illustrated in Figs. 7 and 8, is shown inwhich the drive is communicated from the press'gear by a wideiaced gear Wheel it through a gear wheel it mounted upon the spindle of the impression cylinder and which gears with a gear wheel 2' mounted upon the end of. the spindle b ofthe impression. cylinder near the swiveling bearing a. In this case the gear Wheel 7& is pro:-

vided so as to be movable upon its spindle for disengagement with the gear Wheel 27 whereby the spindle b may be rotated and moved upon its bearing 0 for the removal of renewal of the cylinder or shell.

The invention is of wide application to printing machines.

I claim:

1. In printing machines, an impression cylinder, a printing cylinder, a spindle upon which said printing cylinder is mounted, a swiveling bearing upon which the said spindle is carried at one end and gear for causing the rotation of the said spindle, substantially as described.

- 2. In printing machines, an impression cylinder, a printing cylinder, a spindle upon which said printing cylinder is mounted, a swiveling bearing upon which the said spindle is carried at one end, means at the other end for permitting the movement or" the said spindle away from the impression cylinder and gear for causing the rotation of the spindle, substantially as described.

8. In printing machines, an impression cylinder, a printing cylinder, a spindle upon which said printing cylinder is mounted, a swiveling bearing upon which .the said spindle is carried at one end, a magnetic clutch adjacent the said swiveling bearing, means adjacent the other end of the spindle for permitting the movement of the spindle away from the said impression cylinder and gear for causing the rotation of the said spindle, substantially as described.

4. In printing machines, an impression I. cylinder, a printing cylinder, a spindle upon which said printing cylinder is mounted, a

swiveling bearing upon which the said spinadjacent the other end of the spindle for permitting the movement of the spindle away from the said impression cylinder, and gear for causing the rotation of the said. spindle, substantially as described.

5. In printing machines, an impression cylinder, a spindle for carrying the impression cylinder, a printing cylinder fixedly mounted in relation to the said spindle but in such manner that the cylinder may be withdrawn therefrom in an endwise movement, a swiveling bearing upon Which the said spindle is carried at one end, means at the other end for permitting the movement of the spindle away from the impression cylinder, and gear for causing the rotation of the spindle, substantially as described.

6. In printing machines, an impression cylinder, a printing cylinder, a spindle upon which the said printing cylinder is mounted, a swiveling bearing upon which said spindle is carried at one end, means at the other end for permitting the movement of the spindle away from the impression cylinder, and gear for causing the positive and synchronous movement of the printing and impression cylinders, substantially as described.

GEO. W. MASCORD. 

